Transom-lifter



(No Model.)

G. 11. S1111GE111?.l TRANSOM LIFIER.l

Patented Aug. 11,1885.

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UNrrnD STATES PATENT Carica.

GEORGE H. SARGENT, OF NEW YORK, N. Y., ASSIGNOR TO SARGENT 85 CO., OF NEW HAVEN, CONNECTICUT.

TRANSOlVl-LIFTER..

QPECIFCATION lorrning part of Letters Patent No. 324,170, dated August 11, 1885.

Application led June 1, 13H5. (No model.)

To all wwm/ it may concern.:

Be it known that l, GEORGE H. SARGENT, of New York, in the county of New York and State ot' New York, have invented a new Improvement in Transom-Iiifters; and I do hereby de clare the following, when taken in connection with accompanying drawings, and the letters of reference marked thereon, to be a full,clear, and exact description of the same, and which 1o said drawings constitute part of this specification, and represent, in

Figure l, a front view of the lifter as applied to the jamlo and transom; Fig. 2, a side View of the same; Fig. 3, a vertical section through the worm-disk and rack enlarged; Fig. 4, an

inside view of the disk enlarged.

This invention relates to an improvement in the device applied to the jamb ofa door-opening for connection with the transom over the 2o door and by which the transom may be opened or closed; and the invention consists in the construction hereinafter described, and particularly recited in the claims.

A represents the jamb of the door to which 2 5 the lifter is applied, and B the transom hinged above, as at a; C, the adjusting-rod, which is arranged in suitable bearings, b b, and so as to move freely up and down therein. From the transom an arm, I), extends outward, and from 3o the outer endof this arm to the Yrod C is a connecting-link, E, and so that by raising the rod C the transom willbe opened, as indicated in broken lines, Fig. 2, or drawing the rod downward the transom will be closed, as indicated in Figs. l and 2.

At some point on the rod, and preferably at its lower end, I construct it with a series of teeth transversely across it in the form of a toothed rack, F.

4o G is aworni,(here represented as a dat disk,)

having a worm or spiral shaped rib, d, upon its under face. This disk is arranged in al bearing, H, outside the rack, the bearing sup ported independent of the rack and so as to 4 5 hold the disk in a position inclined to the rack,

as indicated in Fig. 3, so that only that part of the worm on one side of the center will engage the teeth.

To the disk a suitable handle, I, is attached,

5o and to which a person desiring to adjust the transom may readily' apply the hand and impart rotation to the worm-disk G. By turning the disk in one direction the action of the worm-rib d on the rack is to raise the rod and open the transom; turned in the opposite di- 5 5 rection it is to draw the rod downward to close the transom.

The bearing-point of the-teeth of the rack on the worm is in a radial line through the center; hence the bearing has no tendency to 6o cause the worm-disk to rotate; therefore at whatever point the rod may stand it is firmly locked by the worm and can only be moved by the rotation of the worm, and because of the spiral or worm-like shape of the rib suitable force may be applied in closing the transom so as to bring it to a firm bearing in its closed position, and the same power is applied in opening the transom should it stick when closed, and at whatever position the transom 7o may be it will be firmly held by the worm through the rack against any possible induence applied directly up`on it.

The power of the worm upon the rack is so great that very little force applied to rotate the worm will impart corresponding movement l to the rod and transom.

dent in opening and closing the transom are avoided, and many obvious dit'liculties attend 8o ing the use of transornlifters provided with clamping devices are also avoided.

, Any of the known connections between the vertical sliding rod and the transom may be employed to make connection between the rod 8 5 and transom. I therefore do not wish to limit my invention to the particular connection which I have shown and described.

It will be observed that this device is applicable to a transom hung at the top or bottom 9o or pivoted at the center, and is also applica ble to opening and closing skylights, traps, Src., which are hinged or pivoted, and is also applicable to sliding devices-such, for illustration, as a window-sash, the rod being connected directly to the sash, so that the np-anddown movement of the rod will impart a corresponding up-and-down movement to the sash.V I therefore do notwish to be understood as limiting the invention to the operation of rr l, Bythis construction all liabilities to acci- N transoms, or lo the operation ol a ysash or other devieehinged or pivoled.

I am aware that a pinion with a worin has been employed i o operate swinging sash. as l'or ventilators; butin sneh ease a horizontal rook` shaft is required, from which an arm extends radially, and i'rom which arm a connectingrod is hung to the sash, and so that by rotating the worm a rocking' movement is'imparted to thesliai't,wl1ieh rockingmovement of the shaft imparts eorresleionding swinging;` Inovement to the sashes engaged with the shalt. .l do not, therefore, wish to be understood as claiming, broadly, the employment ol' a wormgear to operate a swinging sash.

l. The hereindescribed improvement in transomvliilers, consisting` in the lifting-rod constructed with a toothed raek, F, combined with a worm supported in a bearing l'or rotation, said worin adapted to work in the teeth of the lsaid rack, and whereby, under the rotation ol' the worm, vertical movement is im- 2. In a transom-lifter, the combination of the vertical rod (3, constructed with atoothed rack, F, the disk G. constructed with a spiral or worm-like rib, d, upon its inner l'aee, and arranged in a bearing outside the said rack, the axis of the bearingT inclined to theplane ofthe raok and so that lhe rib on the disk may work in the leeih ol' the rack, the said disk provided willi a suitable handle i'or imparting rotation to i t,and eonneotion between said rod I and the transom, whereby vertical movement imparted to the rod will he communicated to the transom, substantially as described.

GEORGE H. SARGENT.

lVil nesses:

(ino. Munson, WM. J. LADD. 

